Jake Wagner, 19, is an avid Republican, and his father, Peter, a lifelong Democrat. It’s more unusual for the children of liberals to become conservatives than the other way around. (Photograph provided by Peter Wagner via Associated Press)

Robert Mueller’s special counsel investigation into Russian meddling in the 2016 election has cost $6.7 million during the first four and a half months of the probe. Click to see past independent counsel investigations guilty of racking up high bills.